JIPMAT (LR) PYQs

The missing term in the series: $5824, 5242, ?, 4247, 3823$ is

Find the number that can replace the question mark in the series given below: 15, 18, 17, 21, 20, 25, 24, 30, 29, ?

Find the pair of numbers that can replace the question mark (?) in the series given below :

$90,180,12,50,100, ?, ?, 3,50,4,25,2,6,30,3$.